Is it safe to use mobile phone,

EMFs are essentially not the best for humans, not to mention baby. I keep my phone and laptop a distance away from my womb and also use Aries Tech's lifetune devices to turn the emfs into one that is biologically safer. you can also take a look at other emfs blockers that's available in the market. there's also tummy wrap blocker used specially for pregnancy

Yes it is safe to use all of the above mentioned items. No harm and no issues at all.